The use of a neck brace does not influence visual vertical perception

Funabashi, Martha; Silva, Natya N. L.; Watanabe, Luciana M.; Santos-Pontelli, Taiza E. G.; Colafêmina, José Fernando; Carneiro, Antônio Adilton Oliveira; Takayanagui, Osvaldo Massaiti

doi:10.1590/s0004-282x2011000400019

Cited by 8 publications

(8 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Firstly, proprioception alone cannot explain the difference in C-RFT dot scores between muscles fatigued in the sagittal plane and muscles fatigued in the frontal or oblique planes. This is supported by Funabashi’s findings that the use of a neck brace does not provide sufficient afferent input to change a healthy subject’s perception of visual verticality (Funabashi et al, 2011). Additional support for the visual inputs overriding cervical proprioception has been demonstrated in various studies (Karnath et al, 2002; Golomer et al, 2005).…”

Section: Discussionmentioning

confidence: 72%

Effects of cervical muscle fatigue on the perception of the subjective vertical and horizontal

Gosselin

Fagan

2014

SpringerPlus

View full text Add to dashboard Cite

IntroductionCervical functional capacity outcome measures that are simple and reliable are urgently needed in order permit accurate assessment/reassessment during treatments and rehabilitation. Induced neck muscle fatigue has been shown to alter functional capacities such as balance and kinaesthetic sense in the standing posture. The Rod and Frame Test has also shown promise as a method of assessing the effects of chronic neck pain and injury, but currently only in the sitting position. The objectives of this project were therefore 1) to validate the computerised rod and frame test in the standing posture, and 2) to measure the effects that different cervical muscle fatigue protocol would have on the assessment of the subjective visual vertical and horizontal.MethodThe validation of the standing computerised rod and frame test in the standing posture was obtained by comparing results (n = 74) between the sitting and standing positions with the Spearman’s correlation coefficient. In addition, agreement between the two methods was analysed with the Bland-Altman method.Participants (n = 56) resisted with their neck muscles approximately 35% maximum isometric voluntary contraction force for 15 minutes on a purpose built apparatus in eight different directions. Wilcoxon signed rank tests analysed changes in horizontal and vertical rod and frame test between the neutral and all different directions of contraction. The changes of recorded unsigned vertical and horizontal errors for the combined frame condition in all situations of isometric contraction were analysed with two respective one-way repeated measures analysis of variance (ANOVA).DiscussionThe Spearman’s rho and Bland-Altman plots show that the Rod and Frame Test works equally well in sitting and standing positions.After muscle contraction, there were significant increases in error in all participants for both horizontal and vertical rod and frame tests, except after flexion. These errors were predominantly present after fatigue of muscles in the coronal plane of contraction. Proprioception alone cannot explain the difference in the rod and frame results between different muscle groups. It is suggested that an evolutionary advantage of developing improved subjective verticality awareness in the same direction as the main visual field could explain these findings.

show abstract

Section: Discussionmentioning

confidence: 72%

Effects of cervical muscle fatigue on the perception of the subjective vertical and horizontal

Gosselin

Fagan

2014

SpringerPlus

View full text Add to dashboard Cite

show abstract

“…These findings would mean that this internal model is essential and is the main source for the GV altered behavior in patients with PVH. In relation to the somatosensory input as an alternative source of information for the GV, some reports claim the limited influence of the proprioceptive neck information for the visual vertical perception [13]. Besides, the kind of substitutive source of information (internal model or proprioceptive information) required by patients with a noncompensated PVH (with CD), implies a longer GV estimation time and greater steady-state angle error.…”

Section: Discussionmentioning

confidence: 99%

Visual gravitational vertical perception in peripheral vestibular hypofunction

Suárez

Geisinger

Ferreira

et al. 2011

Acta Oto-Laryngologica

View full text Add to dashboard Cite

show abstract

“…To assess SVV, customized software previously developed with a visual angle of 20.14° and sensibility of 0.1° was used [ 8 ]. A neck brace was used to minimize cephalic tilts during the exam [ 9 ].…”

Section: Methodsmentioning

confidence: 99%

Subjective Visual Vertical during Caloric Stimulation in Healthy Subjects: Implications to Research and Neurorehabilitation

Funabashi

Flores

Vicentino

et al. 2015

Rehabilitation Research and Practice

Self Cite

View full text Add to dashboard Cite

Background. The subjective visual vertical (SVV) is a perception often impaired in patients with neurologic disorders and is considered a sensitive tool to detect otolithic dysfunctions. However, it remains unclear whether the semicircular canals (SCCs) are also involved in the visual vertical perception. Objective. The aim of this study was to analyze the influence of horizontal SCCs on SVV by caloric stimulation in healthy subjects. Methods. SVV was performed before and during the ice-cold caloric stimulation (4°C, right ear) in 30 healthy subjects. Results. The mean SVV tilts before and during the caloric stimulation were 0.31° ± 0.39 and −0.28° ± 0.40, respectively. There was no significant difference between the mean SVV tilts before and during stimulation (p = 0.113). Conclusion. These results suggest that horizontal SCCs do not influence SVV. Therefore, investigations and rehabilitation approaches for SVV misperceptions should be focused on otolithic and cognitive strategies.

show abstract

The use of a neck brace does not influence visual vertical perception

Abstract: Although the neck has many sensory receptors, the use of a NB does not provide sufficient afferent input to change healthy subjects' perception of visual verticality.

Cited by 8 publications

References 18 publications

Effects of cervical muscle fatigue on the perception of the subjective vertical and horizontal

Effects of cervical muscle fatigue on the perception of the subjective vertical and horizontal

Visual gravitational vertical perception in peripheral vestibular hypofunction

Subjective Visual Vertical during Caloric Stimulation in Healthy Subjects: Implications to Research and Neurorehabilitation

Contact Info

Product

Resources

About